An investigation on support plate of steam generator by modal analysis
Flow-induced vibration has been found to be responsible for premature failure of PWR steam generators due to wear or fretting fatigue. Based on the theory of elastic plates and shells and the concept of equivalent isotropic solid plate elaborated for perforated tubesheets and tube support plates, the new methodology to determine the effective elastic constants by modal analysis of such perforated plates is described. The computing formula of effective elastic constants for plates with hetero-diameter holes are given in terms of the stiffness superposition method. The studying results indicate that the curves for calculating effective elastic constants E<*> and ν<*> adopted in the ASME are improper in non-circular hole perforated plates. By modal approach, the effective elastic constants of popular used in steam generators tubesheets and tube support plates with various perforation shapes, such as hetero-diameter holes, trefoil and quatrefoil holes are obtained. The universal relationships between the effective elastic constants and the mass fraction are established, which can be used for perforated plates with any arbitrary hole shapes.
Steam generator Perforated plate Support plate Effective elastic constant Modal analysis
Qiwu Dong Tong Liu Minshan Liu
Thermal Energy Engineering Research Centre, Zhengzhou University, Zhengzhou 450002, China
国际会议
国际断裂力学2007年会(Fracture Mechanics and Applications 2007)
长沙
英文
217-221
2007-11-01（万方平台首次上网日期，不代表论文的发表时间）